Friction adjuster



Dec. 25 1923.

E. J. SIBLEY FRICTION ADJUSTER Filed Nov. 10, 1921 Patented Dec. 25, 1923.

Mblll gTE EDWIN JOHN SIBLEY, 0F JAMAICA, NEW YORK.

FRICTION ADJUSTER.

Application filed November 10, 1921. Serial No. 514,205.

To all whom it may concern:

Be it known that I, EDWIN JOHN SIBLEY, citizen of Canada, and resident of J amaica, in the county of Queens and State of New York, have invented certain new and useful Improvements in Friction Adjusters, of which the following is a specification.

This invention relates to friction adjusters for use on casement windows, transoms, doors vor any other hinged device the free swing of Which it is desired to control.

One object of the invention is to provide means whereby the degree of tractional resistance in the adjuster may be regulated or adjusted to a fine degree by imply grasping the barrel of the adjuster in the hand and rotate it either to the left or to the right until the tractional resistance has been regulated as may be desired.

Another object of the invention is to provide means whereby complete release from frictional resistance is given to the hinged device as it reaches approximate closing p0 sition. That is to say, the invention has for one of its objects the provision of certain novel features of construction designed to give to the hinged device absolute freedom from resistance in the adjuster at the moment or time of closing, so that there will be no torsion or strain caused by actual closing (or opening) tending to hinder or prevent the free operation of the adjuster.

In the majority of cases the friction adjuster is used at the top of the casement window, while the pull in closing is more often at the b'otom or lower half of the frame. Hence it will be. readily understood that under such conditions, the resistance against the window operates at the top thereof or outward, while in the act of closing there is a force acting directly opposite or inward. A torsional twisting or spring in the frame immediate-1y results from this condition, so that although the window may be tightly closed at the bottom against the frame, the outward thrust of the adjuster at the top prevents the window from fitting tightly into the frame along its whole length, with the result that it becomes diflicult to operate the bolt or fastener usually employed, and complete closing of the window is not obtained.

This invention provides means permitting free operation, that is closing of the window, the same as if no adjuster were used.

In accordance with the above and other objects for the purpose of providing a generally improved friction casement adjuster, the invention comprises such features of construction and arrangements of parts as are hereinafter set forth, and as illustrated in the accompanying drawing in vwhich Fig, 1 is a view of my improved casement adjuster, partly in sectionand with parts broken away. i

Fig. 2 is a transverse sectional view on line 22 of Figure 1.

Fig. 3 is a longitudinal sectional view on line 3-3 of Figure 1. v

Fig. 4 shows the arrangement of the bolt or fastener for pivoting the adjuster to the frame looking in the direction of arrow 4 in Figure 3.

Fig. 5 is a view similar to Figure 4 illustrating the relative sliding movement between thefastening bolt in the frame and the adjuster.

Fig. 6 is a similar view but shows the parts ina different position. j

The casement adjuster comprises a barrel 1 which is rotatably mounted as at 2 on a:

head or arm 3 secured to a bolt 4 by screw threads 5 and a pin 6 driven through the arm 3 and the bolt 4. The numeral 7 denotes the window sill, frame or other fixed member enclosing the window sash 8 or other movable member, the free swing of which it is desired to control. The sash 8 is pivoted to the frame 7 by hinges as at 9.

To the movable member 8 is secured a bracket 10 to which is pivoted at 11 a plunger 12. A-cap 13 on the end of the barrel provides a guiding means for'the plunger and serves also to close the end of the barrel and enhances the appearance of the device. 4

The barrel 1 and the plunger 12 are operatively connected by a suitable clutch or friction device providing the required tractional resistance between the two members. Within the barrel the plunger is provided with a reduced threaded portion 14L or screw having a pointed head 15 adapted to operate between two springs 16, 16 'seated in the clutch members, 17, 17 These latter are syi metrical and of suitable'friction material, and each member is formed with a recess 18 for receiving the spring 16 and a, reduced bearing portion 19 for the screw 14, In addition each friction member has a nut receiving recess 20. 21 is a nut in threaded-engagement with the screw 14;. The clutch members 1'?" are substantially semicircular in cross section asseeii in Figure 2.

the plungeris screwed into "the am until the pointed head l5engages the springs and separates theiiifthiis piittiiig tension on the V clutch 'menibers in forcing them outward against the wall er the'barrel. The caphas of-"fcours'e first been placed on the plunger is thereafter screwed fast inthe barrel. In orde'r'to prevent the torsion or twist of the sash, which has" been described ab o-ve, I' provide relative sliding movement be tween the adjuster and the bolt ias follows: The bolt 1 is *pre vided with a head 25 having two diametrically disposed "notches 26,.2'6'. Tlie bolt is slidably and rotatably mounted on a base 27 provided with an opening 28 in'whi ch said bolt operates. The hase'27 feri'n'sa "recess 29 forthe'bolt head 25 and "in said base and recess there is secured in any suitable manner a key or stop 30. Th base is secured to the sill 7 by serewse I V In closed position the arts assume the position. shown in Figures 3 and 4,"in'which it willbe observed'that'thebol't "l is at'the one side of the opening 28, which may be cdnsidered s tting a circular slot, and the bolt is 'locke'd. against 'rotati ve movement by the liey 30 whichengafges one ofthe notches 26., When it is desired toopen the window, the'force is "applied adjacent the'free swinging sideof the window or at'the point 35 in'Fi'gnre 1, :lhe inoinent fo'rc'eis applied atsaid'poiiit, the b olt'tis moved within the opening 28 from the position shown in-Figure't to the"position shown in Fig'ure5, in which thebolt 4 is unlocke'dfro'm' the key '30 and'fi'ee to rotate; Continuing the applicationofforce at'the point35 the window may be opened as seen inFigure 6 which "shows the" bolt 4 turned on its axis as the window 7 is opened. In other words, the opening of the window causes first a sliding movement ofthe bolt, whichsliding movement natu rally'and almost at once is merged into .the'

are adapted for use with'swing'ing members turning movement of the bolt asth'e win 7 'do w 'i's opened.

. After the window is opened, the friction is adjustedby merely grasping'the barrel 1 withon'e hand and rotate it either to theleft or tothe right and without necessitating operation of anytime: part. The rotation of the barrel causes the plunger to be Screwed into or out "of the 'nut2fl to force the'springs apartto i-ncrea'sethe friction, or to permit the springs to relax to decrease .the friction or ite n'siionfof the's'prings. The adjustment (if'thefrictitin is preferably done whenthe window is'ope'n as it then ise'asy to deterseesaw quired to hold the window in the position desired or to withstand a certain local wind pressure. j V

The advantages of the slidable pivot 4: aremore apparent and important in closing the window.

As explained above, when the window is almost closed or within, say one inch of closing, there is an outward thrustby the adjuster operating against theinwardly acting force tendingto close the window. The nearer the window comes to closing position, the greater is the difference between the two said forces operating in opposite directions. WVithout the sliding pivot 4, the closing of the window causes a torsion or strain, which prevents free turning movement of the bolt 4 "and consequen'tly prevents complete easy closing of the win-(10w;

In thiscase, however, it will be'seen that when the window is about "to close {completely, the bolt 4 moves easily'fromtheposition show'n in Figure 6 to the position shown in Figure 5, from whence the bolt continues its movement home into'locked' position as in Figu-re'. In other words, the bolt 4 is during the last small movement-(in closing) completely freedrfrom any torsion or strain and the outward thrust at the point opposing the closing movement is eliminated. Q V f The construction herein disclosed p'o'ssesses many advantages. the window door or transom, to which the adjuster is employed, the more important these advantages appear. Adjustment is And the larger 1 till obtained'to a very fine degree without using any tools or detaching any parts, and GUILD.- plete easy closing and opening obtained by reason of the, however slight, sliding movement of "the bolt4 set forth.

, 'The'bolt head 25 is provided with' two of all sizes and dimensions. They 'may be adjusted to hold a verylarge transom, door or window against "relatively very-strong pressure. Yet, if such pressi' re'should be unexpectedly and suddenly exceeded, the entire friction device will yield and slide withinfthefbarrel thus preventing breaks." lVhile I have shown invention in its preferred form, changes may of coiirs'ebe made within5the principle ofthe invention and "the scope of the appended claims.

Iclaim: 7, V 1. The combination with a window casing The and a window hinged thereto, of two interconnected telescopic members, frictional means interposed between the latter, means for pivoting one of said telescopic members to the said window, mechanism for pivoting the other of said telescopic members to the said window casing in a manner to impart unopposed sliding movement to the said two members at the opening and closing of the said window, said mechanism comprising a base secured to said window casing, a pivot on said other telescopic member arranged to rotate in said base member in two opposed directions and capable of a sliding movement with respect to said base at the beginning of the rotative movement in one direction and at the end of the rotative movement in the other direction.

2. The combination with a window casing and a window hinged thereto, of two telescopic members, .one of which is pivoted on said window, the other of which is pivoted on said window casing, means for operating said two telescopic members in frictional relationship while the said window moves with respect to the said window casing and means for automatically eliminating resistance to the operation of said telescopic members when the window is opened or closed.

3. The combination with a swinging window and its frame, of a friction adjuster comprising a plunger pivoted on said window, a barrel for said plunger pivoted on the window frame, friction means between said plunger and barrel and means permitting said barrel to slide longitudinally of its axis with respect to the said window frame at the openin and closing moments of said swinging win dow whereby to eliminate torsional strains in said adjuster at the opening and closing moments aforesaid.

4. A friction adjuster comprising two telescopic members, friction means between the same, means for pivotally connecting one of said members to a fixed element, said pivotal means comprising a base plate having an opening, a pivot secured to the said one member and mounted to rotate and slide'within the said opening and means in said base plate for preventing rotation of said pivot at predetermined stages during the operation of the said friction adjuster.

5. A pivotal connection for friction adjusters having two frictionally operated interconnected telescopic members, comprising a base having an opening, a pivot bolt in one of said members arranged to rotate and slide within said opening and means for automatically locking the said one member against rotation.

6. A pivotal connection for friction adjusters having two frictionally operated in terconnected telescopic members comprising a base having an opening, a pivot bolt secured in fixed relationship to one of the said telescopic members and arranged to rotate and slide within said opening, a notched head on said pivot bolt and a key secured to the said base and adapted to engage a notch in the said head to lock the said one telescopic member against rotation.

7. A casement window adjuster comprising two telescopic members, means for pivoting the one member to the window, mechanism for securing the other member to the window casing in slidable and rotatable relation thereto whereby to eliminate resistance to the operation of said adjuster when the window is opened or closed.

8. A casement window adjuster comprising two telescopic members, friction means between the same, means for pivoting one of said members on the window, mechanism for securing the other of said members to the window casing, and means in said mechanism for relieving the same of resistance from said friction means when the window is opened or closed.

9. A casement window adjuster comprising two telescopic members, means for pivoting the one member to the window, mechanism for securing the other member to the window casing comprising a base secured to the window casing and a slidable and rotatable connection between said base and said other member whereby lateral movement free from torsional strains is imparted to said adjuster at the opening and closing of the said window.

10. A casement window adjuster comprising two telescopic frictionally engaged members, means for pivoting the one member to the window and mechanism for securing the other member to the window casing in a manner to impart an unopposed sliding movement to said adjuster when said window is opened or closed.

11. In a casement window friction adjuster, mechanism giving the window abso lute freedom from resistance in the adjuster at the moment of closing said window, said mechanism comprising a member pivoted to the window, a second member, friction means between said two members and a.

EDWIN JOHN SIBLEY. 

